Portable display unit



FIG. 1 is a perspective view of one embodiment of a portable displayunit embodying my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The shaded area with stippling represents a contrast of material orcolor with respect to the non-shaded areas of the design.

The ornamental design for a portable display unit, as shown and described. 